David began his career as a high school math teacher, spending 20 years in the classroom before moving to a leadership and support role as a mathematics consultant at Wayne Regional Educational Service Agency in Wayne County, Michigan, providing support to 32 independent school districts and over 100 independent charter school academies. He is also an adjunct faculty member at Wayne State University, and he has delivered professional development throughout the country on the effective use of graphing calculators as a T3 National Instructor. David is very passionate about the teaching and learning of mathematics, and he believes that everyone can know, do, and enjoy math if given access to high-quality curriculum and instruction. David loves to spend time with his family, playing board games, camping, hiking, hunting, fishing, and playing guitar and singing on his church worship team.